drivers: audio: dmic_nrfx_pdm: Add support for pinctrl

Add support for the new pinctrl API to the DMIC driver that handles
the nRF PDM peripheral. Update code of the driver and the related
devicetree binding.

Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
2 files changed